USPS Flat Rate Envelopes & Boxes | Rate Table
What is USPS Flat Rate Envelopes?
With USPS Flat Rate Envelopes, if it fits, it ships for one low rate. When sealing the envelope, the container flaps must be able to close within the normal folds. Learn more about USPS Flat Rate Envelope dimensions.
Most USPS Flat Rate Envelopes have a maximum contents weight of 70lbs.
View domestic and international package sizes and dimensions.
- Package Sizes and Dimensions - USPS Domestic | Overview
- Package Sizes and Dimensions - USPS International | Overview
If you are shipping internationally, be sure to check the country restrictions to determine if lower weight limits apply.
For international shipments, USPS uses Country Price Groups to calculate shipping rates. Learn more about Country Price Groups.
Compare 2020 Rates: USPS Flat Rate Envelopes & Boxes
| USPS Flat Rate Envelopes - Domestic (2020) | |||
|---|---|---|---|
| Service | Flat Rate Type | Retail Rates | Commercial Rates |
| Priority Mail | Envelope | 7.75 | 7.15 |
| Legal Envelope | 8.05 | 7.45 | |
| Padded Envelope | 8.40 | 7.75 | |
| Priority Mail Express | Envelope | 26.35 | 22.75 |
| Legal Envelope | 26.50 | 22.95 | |
| Padded Envelope | 26.95 | 23.25 | |
| USPS Flat Rate Boxes - Domestic (2020) | |||
|---|---|---|---|
| Service | Flat Rate Type | Retail Rates | Commercial Rates |
| Priority Mail | Small Box |
8.30 | 7.65 |
| Medium Box |
15.05 | 13.20 | |
| Large Box |
21.10 | 18.30 | |
| APO Large Box | 19.60 | 16.80 | |
| USPS Flat Rate Envelopes - International (2020) Retail Rates |
|||||||||
|---|---|---|---|---|---|---|---|---|---|
| Service | Prices by Country Price Group | ||||||||
| 1 | Canada | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |
| Priority Mail | - | 26.90 | 33.75 | 35.35 | 37.45 | 36.45 | 38.60 | 36.45 | 37.45 |
|
Priority Mail |
45.95 | - | 61.65 | 66.50 | 64.95 | 64.95 | 69.35 | 64.85 | 68.95 |
| USPS Flat Rate Envelopes - International (2020) Commercial Rates |
|||||||||
|---|---|---|---|---|---|---|---|---|---|
| Service | Prices by Country Price Group | ||||||||
| 1 | Canada | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |
| Priority Mail | - | 25.55 | 32.05 | 33.60 | 35.60 | 34.65 | 36.65 | 34.65 | 35.60 |
| Priority Mail Express |
42.85 | - | 56.75 | 62.45 | 60.95 | 60.95 | 65.95 | 59.80 | 61.75 |
| USPS Flat Rate Boxes - International (2020) Retail Rates |
|||||||||
|---|---|---|---|---|---|---|---|---|---|
| Service | Flat Rate |
Prices by Country Price Group | |||||||
| Canada |
2 | 3 | 4 | 5 | 6 | 7 | 8 | ||
| Priority Mail | Small Box | 27.90 | 35.35 | 36.45 | 38.60 | 37.45 | 39.60 | 37.45 | 38.60 |
| Medium Box | 51.55 | 75.95 | 77.50 | 75.35 | 79.65 | 86.40 | 78.60 | 81.75 | |
| Large Box | 67.05 | 99.10 | 101.20 | 99.10 | 103.35 | 109.15 | 102.35 | 107.05 | |
| USPS Flat Rate Boxes - International (2020) Commercial Rates |
|||||||||
|---|---|---|---|---|---|---|---|---|---|
| Service | Flat Rate |
Prices by Country Price Group | |||||||
| Canada |
2 | 3 | 4 | 5 | 6 | 7 | 8 | ||
| Priority Mail | Small Box | 26.50 | 33.60 | 34.65 | 36.65 | 35.60 | 37.60 | 35.60 | 36.65 |
| Medium Box | 48.95 | 72.15 | 73.65 | 71.60 | 75.65 | 82.10 | 74.65 | 77.65 | |
| Large Box | 63.70 | 94.15 | 96.15 | 94.15 | 98.20 | 103.70 | 97.25 | 101.70 | |
2021 Rates: USPS Flat Rate Envelopes & Boxes
Effective January 24, 2021. Learn more about 2021 rates.
| USPS Flat Rate Boxes - Domestic (2021) | |||
|---|---|---|---|
| Service | Flat Rate Type | Retail Rates | Commercial Rates |
| Priority Mail | Small Box |
8.45 | 7.90 |
| Medium Box |
15.50 | 13.75 | |
| Large Box |
21.90 | 19.30 | |
| APO Large Box | 20.40 | 17.80 | |
| USPS Flat Rate Envelopes - International (2021) Retail Rates |
|||||||||
|---|---|---|---|---|---|---|---|---|---|
| Service | Prices by Country Price Group | ||||||||
| 1 | Canada | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |
| Priority Mail | - | 28.50 | 35.45 | 39.30 | 38.20 | 39.70 | 40.15 | 40.55 | 38.95 |
|
Priority Mail |
45.95 | - | 62.95 | 67.95 | 66.95 | 66.95 | 69.95 | 69.95 | 68.95 |
| USPS Flat Rate Envelopes - International (2021) Commercial Rates |
|||||||||
|---|---|---|---|---|---|---|---|---|---|
| Service | Prices by Country Price Group | ||||||||
| 1 | Canada | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |
| Priority Mail | - | 27.10 | 33.70 | 37.50 | 36.30 | 37.70 | 38.15 | 38.50 | 37.00 |
| Priority Mail Express |
42.85 | - | 57.95 | 63.95 | 62.95 | 62.95 | 66.95 | 62.95 | 61.75 |
| USPS Flat Rate Boxes - International (2021) Retail Rates |
|||||||||
|---|---|---|---|---|---|---|---|---|---|
| Service | Flat Rate |
Prices by Country Price Group | |||||||
| Canada |
2 | 3 | 4 | 5 | 6 | 7 | 8 | ||
| Priority Mail | Small Box | 29.55 | 37.10 | 40.55 | 39.40 | 40.85 | 41.20 | 43.25 | 40.15 |
| Medium Box | 54.65 | 79.15 | 81.40 | 80.60 | 83.65 | 89.85 | 94.35 | 85.00 | |
| Large Box | 71.05 | 104.05 | 106.25 | 105.15 | 108.50 | 113.50 | 118.05 | 111.35 | |
| USPS Flat Rate Boxes - International (2021) Commercial Rates |
|||||||||
|---|---|---|---|---|---|---|---|---|---|
| Service | Flat Rate |
Prices by Country Price Group | |||||||
| Canada |
2 | 3 | 4 | 5 | 6 | 7 | 8 | ||
| Priority Mail | Small Box | 28.10 | 35.25 | 38.50 | 37.45 | 38.80 | 39.15 | 41.10 | 38.15 |
| Medium Box | 51.90 | 75.75 | 77.35 | 76.55 | 79.45 | 85.35 | 89.65 | 80.75 | |
| Large Box | 67.50 | 98.85 | 100.95 | 99.90 | 103.05 | 107.80 | 112.15 | 105.80 | |
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